The Gladsaxe Sports Center located in Gladsaxe close to Copenhagen and is owned by Gladsaxe Municipality. The heated area of the building (Atemp) is 14 900 m2. The building includes a public swimming pool with bathing and changing rooms and two sports halls (Sports Hall 1 and Sports Hall 2), both with their own bathing and changing rooms. The sports center was built in the 1970s, but some parts where added later.
Throughout the years there have been different renovations and some of the technical installations have been made more efficient. The aim of the current renovation was to improve the indoor climate as well as improve the energy performance of the building. The specific energy use of the building before renovation was about 168 kWh/m2 yr.
In Step 1 twelve energy saving measures are identified but only ten were chosen to be part of the final package, providing an internal rate of return about 7 % for the whole package. The energy efficiency improvement measures were including more efficient ventilation systems, efficient lighting, energy efficient doors and windows and improved insulation of some parts of building envelope. The estimated total energy saving potential was 26 % compared to the new baseline, corresponding to about 486 MWh energy savings per year.
As part of the implementation of new air handling units (AHU) in Step 2 there was carried out a significant upgrade of indoor climate - improvement of air distribution and reduction of relative humidity in the swimming hall as well as well as solving indoor climate problems in Sports Hall 1.
The results for energy use follow-up in Step 3 show that there has been achieved energy saving of 29 % and 27 % compared to baseline for respectively heating and electricity. The internal rate of return when comparing the results to the baseline is 14 %.
The owner is interested in further optimization of the energy consumption. There will be performed a sensitivity analysis to identify best set points for water and air temperature as well as max recirculation air flow and possibility for lower night temperatures in the pool hall.
Read more about the outcomes of Step 1
Read more about the outcomes of Step 2 and 3